Unlock instant, AI-driven research and patent intelligence for your innovation.

Biological ester-poly(vinylidene fluoride) composite film and preparation method and uses

A technology of polyvinylidene fluoride and vinylidene fluoride, which is applied in the fields of chemical instruments and methods, water pollutants, water/sewage treatment, etc., and can solve problems such as accumulation and few researches on removal technology

Inactive Publication Date: 2008-04-23
RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the removal of pollutants by these membranes is based on physical separation, and there are few researches on the removal technology of lipophilic toxic organic pollutants with little content in water bodies, which are cumulative and have high toxicity risks.

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Biological ester-poly(vinylidene fluoride) composite film and preparation method and uses
  • Biological ester-poly(vinylidene fluoride) composite film and preparation method and uses
  • Biological ester-poly(vinylidene fluoride) composite film and preparation method and uses

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: vinylidene fluoride-trioleate composite film (wherein trioleate content 1.3%)

[0030] The film formula for the experiment is as follows: vinylidene fluoride: N, N'-dimethylacetamide: polyethylene glycol-1000: glycerol trioleate = 20: 78: 2: 1.5 (weight percent); film making process: L-S phase inversion method; the evaporation time is 60 seconds, and the temperature of the cold dipping solution is 20°C. Table 1 is the basic physical and chemical properties of the prepared composite membrane.

[0031] Table 1 Basic physicochemical properties of vinylidene fluoride-trioleate (1.5%) composite membrane

[0032] Mechanical strength (kg)

[0033] 31～45

Embodiment 2

[0034] Example 2: Utilize the vinylidene fluoride-trioleate (1.5%) composite membrane material enrichment of organochlorine pesticides in water

[0035] About 1g of composite membrane material was put into flowing water prepared in the laboratory, in which the concentrations of five organochlorine pesticides were 2ppb each. During the experiment, samples were taken at intervals of 0.5, 1, 2, 4, 8, 14, and 20 days, and were dialyzed through hexane for 24 hours. The concentration of organochlorine pesticides in hexane was analyzed by GC / ECD, and converted to the concentration of pesticides in the vinylidene fluoride composite film. content. The chromatographic analysis conditions are: HP5890GC / ECD detector, HP-5 type 60m×0.32m×0.25um quartz capillary column, carrier gas: high-purity N 2 ;Initial temperature: 85°C, rise to 180°C at 10°C per minute, stay for 15 minutes; rise to 280°C at 20°C per minute, stay for 20 minutes. Injection port temperature: 250°C, detector temperature...

Embodiment 3

[0039] Example 3: Utilize the made vinylidene fluoride-trioleate (1%) composite membrane material to purify organic chlorine slightly polluted water

[0040] The film formula for the experiment is as follows: vinylidene fluoride: N, N'-dimethylacetamide: polyethylene glycol-1000: glycerol trioleate=20:78:2:1 (weight percent);

[0041] Film-making process: L-S phase inversion method is adopted; the evaporation time is 60 seconds, and the temperature of the cold dipping solution is 20°C. Adsorption and removal experiment: six organochlorine pesticides in simulated water in the laboratory, namely Fulelin, Lindane, Heptachlor, Aldrin, Dildrin, and DDT, each with an initial concentration of 10ppb. Take about 1g of the composite membrane and put it in 50ml of simulated water to carry out the shake flask experiment. During the experiment, the vinylidene fluoride was taken out every 1h, 2h, 4h, 8h, 12h, 24h, 48h, and 96h. After the water sample is extracted with petroleum ether, it ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A composite biolipoid / polyvinylidene fluoride film is prepared from metafluoroethylene as skeleton and biolipoid as filler through dissolving the skeleton in solvent, adding biolipoid, dissolving at 25-35 deg.C, preparing film by L-S phase transfer method, evaporating for 20-60 S, immersing in liquid at 15-25 deg.C, flushing with water, and storing in distilled water. Said film can be used for monitoring organic toxic pollutant and removing the organic toxic pollutant from drinking water.

Description

technical field [0001] The present invention relates to the technical field of environmental monitoring and pollution control, specifically: [0002] The invention relates to a biological ester / polyvinylidene fluoride composite film. [0003] It also relates to a method for preparing the above-mentioned composite membrane. [0004] It also relates to the application of the above-mentioned composite membrane in pre-enrichment and removal of organic pollutants in water environment. Background technique [0005] In terms of environmental monitoring, more and more attention has been paid to the pollution of trace and trace toxic organic pollutants such as organochlorine pesticides and dioxins. Such pollutants have potential ecological and health threats, and the concentration in water is usually one part per billion (ppb, or μg / L), or even as low as one part per trillion (ppt, or ng / L). Traditional sample concentration and pre-treatment technologies, such as water sample liqu...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Patents(China)
IPC IPC(8): C08J5/18C08L27/14C08K5/10C02F1/58C02F101/36
Inventor 王子健吕怡兵王静荣
Owner RES CENT FOR ECO ENVIRONMENTAL SCI THE CHINESE ACAD OF SCI